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Add Languages page with support matrix #55

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Add Languages page with support chart
ericgregory Dec 16, 2025
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update GraalWasm link and clarify notes
ericgregory Dec 18, 2025
34b997b
update GraalVM link and notes
ericgregory Dec 19, 2025
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35 changes: 35 additions & 0 deletions docs/languages.md
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---
title: "Languages"
sidebar_position: 2.5
---
## Language support for components

Currently, these languages can be compiled to Wasm components. Some languages have first-party support for Wasm components, while other languages rely on externally maintained tools.

| Language | Name | WASI Version | Maintained By | Notes |
| ------------------------- | ------------------------------------------------------------------------------------------------------ | ------------ | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| C and C++ | [`wasi-sdk`](https://github.com/WebAssembly/wasi-sdk) | 0.2 + 0.3 | W3C Wasm CG | 0.3 implementation is in progress |
| C# | [`componentize-dotnet`](https://github.com/bytecodealliance/componentize-dotnet) | 0.2 | Bytecode Alliance | |
| Go | [`go-modules`](https://github.com/bytecodealliance/go-modules) | 0.2 | Bytecode Alliance | |
| Java | [GraalVM](https://www.graalvm.org/) | - | Oracle | Planned - [Tracking Issue](https://github.com/oracle/graal/issues/9762), [Roadmap](https://github.com/orgs/oracle/projects/21/views/1), [Presentation](https://youtu.be/uefc2t9AmQI?t=1218) |
| JavaScript and TypeScript | [`jco`](https://github.com/bytecodealliance/jco) | 0.2 | Bytecode Alliance | |
| Kotlin | [Kotlin](https://kotlinlang.org/docs/wasm-wasi.html) | 0.2 | JetBrains | Planned - [Tracking Issue](https://youtrack.jetbrains.com/issue/KT-64568) |
| Python | [`componentize-py`](https://github.com/bytecodealliance/componentize-py) | 0.2 | Bytecode Alliance | |
| Python | [`cpython`](https://snarky.ca/state-of-wasi-support-for-cpython-march-2024/) | 0.2 | Python | Implementation in progress |
| Ruby | [`ruby.wasm`](https://github.com/ruby/ruby.wasm) | 0.2 | Ruby | Implementation in progress |
| Rust | [`wasm32-wasip2`](https://doc.rust-lang.org/rustc/platform-support/wasm32-wasip2.html) compiler target | 0.2 + 0.3 | Rust Project | [0.2 Introduction](https://blog.rust-lang.org/2024/04/09/updates-to-rusts-wasi-targets/), [0.2 Stabilization](https://blog.rust-lang.org/2024/11/26/wasip2-tier-2/), 0.3 is planned |
| Swift | [Swift](https://www.swift.org/) | 0.2 | Swift | Planned - [Roadmap Accepted](https://forums.swift.org/t/accepted-vision-a-vision-for-webassembly-support-in-swift/80332) |

### Bindings generators

The bindings generators below provide a way to make Wasm function calls using [interfaces](./interfaces.md) in a given language.

| From | To | Name |
| -------------------- | -------------------- | ------------------------------------------------------------------------------------------------- |
| Wasm Interface Types | C and C++ | [wit-bindgen c](https://github.com/bytecodealliance/wit-bindgen/tree/main/crates/c) |
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@ricochet ricochet Feb 24, 2026

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Should separate these since cpp has it's own generator

| Wasm Interface Types | C# | [wit-bindgen csharp](https://github.com/bytecodealliance/wit-bindgen/tree/main/crates/csharp) |
| Wasm Interface Types | JSON Schema | [component2json](https://github.com/microsoft/wassette/tree/main/crates/component2json) |
| Wasm Interface Types | Markdown | [wit-bindgen markdown](https://github.com/bytecodealliance/wit-bindgen/tree/main/crates/markdown) |
| Wasm Interface Types | Moonbit | [wit-bindgen moonbit](https://github.com/bytecodealliance/wit-bindgen/tree/main/crates/moonbit) |
| Wasm Interface Types | Rust | [wit-bindgen rust](https://github.com/bytecodealliance/wit-bindgen/tree/main/crates/guest-rust) |
| WebIDL | Wasm Interface Types | [webidl2wit](https://github.com/wasi-gfx/webidl2wit) |